Metallurgical performance of Ca3TiFe2O8

Ca3TiFe2O8 (abbreviated as CTF), which is a significant mineral phase in the sinter of titanium-containing iron ore, was successfully prepared by solid-state reaction (calcined at 1553 K for 24 h) by using analytical reagents in this study. The metallurgical performance (melting performance and reduction behavior) was systemically characterized and the enthalpy change data of CTF was tested. The results show that softening temperature, melting temperature, and flowing temperature of CTF were 1691 K, 1734 K, and 1753 K, respectively. The non-isothermal reduction results revealed that CTF was reduced to Fe, CaO, and perovskite in a single step, and the CTF reduction was completed when the temperature reached 1423 K. The results of isothermal reduction shows that the reduction degree of CTF was 89% when reduced at 1173 K for 79.2 min, and the order of reduction performance was Fe2O3 > Fe3O4 > CaO∙2Fe2O3 > CaO∙Fe2O3> Ca3TiFe2O8> 2CaO∙Fe2O3> Ca3Fe2Si1.58Ti1.42O12.